28289283 has 16 divisors (see below), whose sum is σ = 41236992. Its totient is φ = 17108000.

The previous prime is 28289281. The next prime is 28289321. The reversal of 28289283 is 38298282.

It is a cyclic number.

It is not a de Polignac number, because 28289283 - 2¹ = 28289281 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28289281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 29593 + ... + 30533.

It is an arithmetic number, because the mean of its divisors is an integer number (2577312).

Almost surely, 2^28289283 is an apocalyptic number.

28289283 is a deficient number, since it is larger than the sum of its proper divisors (12947709).

28289283 is a wasteful number, since it uses less digits than its factorization.

28289283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1866.

The product of its digits is 110592, while the sum is 42.

The square root of 28289283 is about 5318.7670563769. The cubic root of 28289283 is about 304.7010705488.

The spelling of 28289283 in words is "twenty-eight million, two hundred eighty-nine thousand, two hundred eighty-three".